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Showing 1 to 17 of 17 for “"effective modulus"”.
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Performance of microstructural finite element models in predicting the effective modulus of trabecular bone
… cycle was developed to determine the apparent modulus of a structure using the beam-shell Finite Element model [2]. The cycle imports micro-CT scans of a structure, discretises the structure into a beam-shell mesh, performs a Finite Element simulation and outputs the apparent modulus of the …
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Modelling of the filament-winding fabrication process
… of the segmented steel mandrel, simulated by an effective modulus (degraded by segmentation), and the instantaneous laydown tension loss parameters significantly affected the results of the model. Including the effective modulus for the segmented mandrel in the model reduced the difference in the …
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New in-plane and interlaminar shear test methods for fiber reinforced composites
… material were obtained. The interlaminar shear modulus of individual plies and the effective modulus for the laminate were determined. Variations of nominally equal plies were observed.
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Estudo de deformação vertical de pavimento para o dimensionamento de recapeamentos
… program in FORTRAN computer language for it. The effective modulus of elasticity of the existing pavement and subgrade soil altogether is admitedly determited from deflection measurements with the Benkelman beam. It is described a field work performed in order to determine the characteristics of …
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FEM of nanoindentation on micro- and nanocrystalline Ni: Analysis of factors affecting hardness and modulus values.
… affecting pile-up are the ratio of the effective modulus to yield stress Eeff/σ and the work hardening behavior. Two separate cases of work hardening rates were considered; one with no work hardening rate and other with a linear work hardening rate. Specifically, it is observed that pile …
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Long term behavior of cable strayed bridges
… proposed in this thesis is the "Age-Adjusted Effective Modulus Method". It was chosen among others because it is one of the most commonly used, and because it is highly accessible.
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Comparing In Situ and Bulk Constitutive Properties of a Structural Adhesive
… in both the linear and nonlinear regions. 2. Modulus of elasticity in bulk adhesive tests was similar to the effective modulus of elasticity in in situ tests. 3. Prediction of normal yield strengths of the in situ adhesive through simple failure theory models proved to be inaccurate. Stress …
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Investigation of Concrete Mixtures to Reduce Differential Shrinkage Cracking in Composite Bridges
… strength, splitting tensile strength, Young's modulus of elasticity, and unrestrained shrinkage was also collected to compare against a common bridge deck topping mix to ensure that the mixes used in this research project are suitable for use in the field. A parametric study utilizing the Age …
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Investigation of Concrete Mixtures to Reduce Differential Shrinkage Cracking in Inverted T Beam System
… strength, splitting tensile strength, modulus of elasticity and unrestrained shrinkage. The four best performing mixes were selected for further study of their time dependent properties. The test data was compared against the data from various prediction models to determine the model …
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Short-term and time-dependent flexural behaviour of steel fibre-reinforced reactive powder concrete
… compressive and flexural behaviour, static chord modulus of elasticity and crack mouth opening. In addition to the short-term tests, investigation into the time-dependent material behaviour was undertaken and included the creep and shrinkage characteristics of the material. The response of the …
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Indentation analysis and mechanical modeling of multilayered composites
… can be retrieved beyond a certain depth. The effective modulus was found to be representative of the out-of-plane modulus of the multilayer composite. For the Al/SiC multilayers above Si substrate, the effects of the substrate material and heterogeneity of the composite play an important role …
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Predicting and testing the tensile relaxation of concrete
… from the creep function. The Age Adjusted Effective Modulus method (AAEM) given in the MC2010 and the Approximate Relaxation Function (ARF) in MC90-93 are mentioned. Values from the two were compared with experimental relaxation results to verify their accuracy in predicting the relaxation …
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Stimuli-responsive polymer nanotube arrays
… confocal laser scanning microscopy, and in the effective modulus of the nanotube arrays as measured by AFM-based nanoindentation. Parallel to experimental work, finite element analysis of simulated indentation on the nanotube arrays showed deformation mechanisms and a discontinuous …
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Recommendations for Longitudinal Post-Tensioning in Full-Depth Precast Concrete Bridge Deck Panels
… spacing, and span length. The age-adjusted effective modulus method was used to account for the ongoing effects of creep and shrinkage in concrete. Results from the Mathcad models used in the parametric studies were confirmed through comparison with results obtained from finite element …
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Application of advanced material analyses for the investigation of the role of nano-mechanical properties in cell - scaffold interactions
… Size effect theories predict that the effective modulus of elasticity increases as the length scale of measurement decreases. These changes occur at the length scales of the order of the cell and their effects on cellular mechanotransduction have not yet been investigated. This body of …
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Effective mechanical Properties of material models with random heterogeneities
… heterogeneities. We start by investigating the effective elastic properties of one-, two-, and three-dimensional rectangular blocks whose Young's modulus varies spatially as a lognormal random field. We decompose the spatial fluctuations of the Young's log-modulus F = In E into first- and …
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Creep and Shrinkage Effects on Steel-Concrete Composite Beams
… an analytical approach using the age-adjusted effective modulus method (AEMM) was used to calculate the long-term deflection of a simply-supported steel-concrete composite beam. The ACI 209R-92 and CEB MC90-99 models, which adopt the concept of an ultimate coefficient, formed the basis of the …